a small relative of shrimps and crabs. 与虾和螃蟹有一定的亲戚关系
If we are to follow, we must use a submarine. 如果想要跟下去,必须乘潜水艇
As the Sun disappears, a profound change takes place in the ocean. 昼去夜至,海洋发生了另一个重大变化
It's difficult for a single dolphin to catch the fish. 单只海豚想吃它们是很困难的
To avoid wasting energy the work as a group. 为了避免浪费精力,它们进行团队合作
The news has spread. Now a number of schools are on their way. 消息传开,大量的真海豚上路了
They're heading towards the Azores volcanic islands a thousand miles west of Portugal. 它们向亚速尔游去 葡萄牙以西1000英里的火山群岛
A They've sensed there's food around, 它们感觉到附近有食物
There's a chance that, eventually, it may spot a weakened fish that's catchable. 可能到最后可以找到一条 容易抓到的老弱的鱼